Bài viết Ảnh hưởng của liều lượng kali và phốt pho lên sự phát triển và năng suất đậu tương VNUAĐ2 tại Gia Lâm – Hà Nội nghiên cứu xác định ảnh hưởng của liều lượng bón kali và phốt pho để xác định mức phù hợp cho giống đậu tương mới VNUAĐ2, làm cơ sở để xây dựng quy trình canh tác giống. | 20 Trường Đại học Nông Lâm TP. Hồ Chí Minh Effects of potassium and phosphorous on growth and yield of soybean variety VNUAĐ2 in Gia Lam Ha Noi Hang T. T. Vu amp Thang N. Vu Faculty of Agronomy Vietnam National University of Agriculture Ha Noi Vietnam ARTICLE INFO ABSTRACT Research Paper The experiment was carried out to determine effects of potassium and phosphorus fertilizers on growth and yield of the soybean vari- Received June 26 2022 ety VNUAĐ2. The experiment was conducted in the spring season of Revised October 19 2022 2021 and was a split-plot design with 3 replications. Potassium levels Accepted October 28 2022 included 0 60 80 and 100 kg ha and phosphorous levels were 0 70 90 and 110 kg ha. The effects of different fertilizer rates were determined through growth and development characteristics plant height number of leaves number of nodes number of branches leaf area index num- ber and weight of nodules yield components and yield. Results showed that phosphorus and potassium fertilizer application resulted in better plant growth and development than no fertilizer application. Also the average plant height to cm number of branches to Keywords number of nodules in the flowering period to and yields to tons ha with phosphorus application were better than Phosphorous the plant height cm number of branches number of nod- Potassium ules and yield tons ha without phosphorus application. Soybean Different levels of fertilization affected the growth and development of Yield VNUAĐ2 variety and its yield. The level of application of potassium 80 kg ha and phosphorus 90 kg ha significantly increased yield compo- nents and yield by 10 1 - 50 as compared with no fertilizer application. When compared with other fertilization levels the application of potas- sium 80 kg ha and phosphorus 90 kg ha resulted in better total pod number of pods plant - higher number of filled pods of pods plant
